supervisor + uwsgi 部署python服务流程
最近由于某个python服务不稳定，有时候是造成服务器down机，有时候是服务本身突然就挂了。查了一下原因，发现是内存资源占用过高导致的，
为了让服务稳定运行，便打算引入supervisor + uwsgi对服务进行分布式部署。
第一步 安装 uwsgi和supervisor
由于我们是内网环境，所以需要先去下载安装包，可以根据需要选择版本
uwsgi 安装包 uWSGI 2.0.19 — uWSGI 2.0 documentation
supervisor 安装包 supervisor · PyPI
下载之后上传到服务器，解压python setup.py install 安装
第二步 python服务中加上uwsgi和supervisor的配置文件
可以在项目中新建一个目录runconfig，来放置配置
配置有两个uwsgi.ini和supervisor.ini
第三步 根据需要添加配置
参考配置
uwsgi.ini文件
[uwsgi]
module = app_starter:app
#用以启动程序名
processes = 2
#子进程数量
chdir = /data/project
#启动程序目录
pidfile = /data/project/runconfig/uwsgi.pid
chmod-socket = 660
# 当服务器退出时自动删除unix socket文件和pid文件
vacuum = true
#http地址和端口
http = 0.0.0.0:4000
# serializer requests
thunder-lock = true
# enable threads support
enable-threads = true
buffer-size = 32768
log-maxsize = 102400000
supervisor.ini文件
[program:uwsgi]
command=bash /data/project/runconfig/restart_service.sh??????????????; the program (relative uses PATH, can take args)
directory=/data/project??????????????; directory to cwd to before exec (def no cwd)
priority=999??????????????????; the relative start priority (default 999)
autostart=true????????????????; start at supervisord start (default: true)
startsecs=10???????????????????; # of secs prog must stay up to be running (def. 1)
startretries=3????????????????; max # of serial start failures when starting (default 3)
stopsignal=INT???????????????; signal used to kill process (default TERM)
stopasgroup=true?????????????; send stop signal to the UNIX process group (default false)
killasgroup=true?????????????; SIGKILL the UNIX process group (def false)
user=test???????????????????; setuid to this UNIX account to run thell program
redirect_stderr=true??????????; redirect proc stderr to stdout (default false)
stdout_logfile=/data/project/logs/supervisor.log????????; stdout log path, NONE for none; default AUTO
stdout_logfile_maxbytes=100MB???; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=10?????; # of stdout logfile backups (0 means none, default 10)
第四步，增加重启配置脚本restart_service.sh
#!/bin/bash
set -e
cd /data/project
git pull
source /etc/profile
source /home/test/.bashrc
oldservice=`ps -ef | grep 'uwsgi.ini' | grep -v grep | awk '{print $2}'`
if [ -n "${oldservice}" ]; then
????uwsgi --stop /data/project/runconfig/uwsgi.pid
fi
uwsgi --ini /data/project/runconfig/uwsgi.ini
第五步 新增supervisord.conf文件
在/etc 目录下新建目录supervisor，
使用echo_supervisord_conf > /etc/supervisor/supervisord.conf在该目录下创建文件supervisord.conf
supervisord.conf的参考配置
[unix_http_server]
file=/data/project/runconfig/supervisor.sock???; the path to the socket file
chmod=0766?????????????????; socket file mode (default 0700)
[supervisord]
logfile=/data/project/logs/supervisord.log ; main log file; default $CWD/supervisord.log
logfile_maxbytes=50MB????????; max main logfile bytes b4 rotation; default 50MB
logfile_backups=10???????????; # of main logfile backups; 0 means none, default 10
loglevel=info????????????????; log level; default info; others: debug,warn,trace
pidfile=/data/project/runconfig/supervisord.pid ; supervisord pidfile; default supervisord.pid
nodaemon=false???????????????; start in foreground if true; default false
silent=false?????????????????; no logs to stdout if true; default false
minfds=1024??????????????????; min. avail startup file descriptors; default 1024
minprocs=200?????????????????; min. avail process descriptors;default 200
user=test? ? ? ? ? ?; setuid to this UNIX account at startup; recommended if root
[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
[supervisorctl]
serverurl=unix:///data/project/runconfig/supervisor.sock ; use a unix:// URL??for a unix socket
[include]
files = /data/project/runconfig/supervisor*.ini
第六步设置开机自启
进入到/usr/lib/systemd/system/
cd /usr/lib/systemd/system/
创建文件supervisord.service
sudo vim supervisord.service
supervisord.service参考配置
[Unit]
Description=supervisor daemon
#After=rc-local.service nss-user-lookup.target
[Service]
Type=forking
ExecStart=/usr/local/python3817/bin/supervisord(根据自己安装目录修改) -c /etc/supervisor/supervisord.conf
ExecStop=/usr/local/python3817/bin/supervisorctl(根据自己安装目录修改) shutdown
ExecReload=/usr/local/python3817/bin/supervisorctl(根据自己安装目录修改) reload
KillMode=process
Restart=on-failure
RestartSec=42s
User=test
[Install]
WantedBy=multi-user.target
启用服务
systemctl enable supervisord
启动服务
systemctl start supervisord
查看服务状态
systemctl status supervisord
查看开机自启是否启用
systemctl is-enabled supervisord
supervisorctl的一些常用命令
supervisorctl shutdown 停止supervisord服务
supervisorctl reload 重启 supervisord服务
supervisorctl update 更新 supervisord.conf文件后重启服务
supervisorctl status 查看 supervisord服务进程状态